Possible over fueling?

[Fazer Jake]

checked the plugs and it doesnt appear to be that rich, maybe a tad.

http://i43.tinypic.com/mjpctw.jpg

http://i42.tinypic.com/4hqu1.jpg

restricting exhaust flow would effect the power though? The powers best its ever been tbh, i'm going to do  a few tanks to see the mpg, i only initially tested it at 80miles